Commitments and Contingencies - Schedule of Changes in Estimated Loss (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | 72 Months Ended |
|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2025 |
Jun. 30, 2025 |
|
| Loss contingency accrual roll forward | |||
| Balance at December 31, 2024 | $ 1,001 | ||
| Increase in accrued estimated losses | 21 | ||
| Amounts paid | $ (121) | (285) | $ (10,303) |
| Balance at June 30, 2025 | 737 | 737 | 737 |
| 2017/2018 Wildfire/Mudslide Events | |||
| Loss contingency accrual roll forward | |||
| Balance at December 31, 2024 | 426 | ||
| Increase in accrued estimated losses | 0 | ||
| Amounts paid | (59) | (158) | (9,612) |
| Balance at June 30, 2025 | 268 | 268 | 268 |
| Other Wildfire Events | |||
| Loss contingency accrual roll forward | |||
| Balance at December 31, 2024 | 575 | ||
| Increase in accrued estimated losses | 21 | ||
| Amounts paid | (62) | (127) | (691) |
| Balance at June 30, 2025 | $ 469 | $ 469 | $ 469 |